JPH0479680A - Magnetic picture recording and reproducing device - Google Patents

Abstract

PURPOSE:To make pictures with titles or pictures without title arbitrarily selectable at the time of enjoys by reproducing video signals, all fields of which have titles, through an adder. CONSTITUTION:Video signals are inputted to a video signal recording circuit of a VTR section while the field of the signals is selectively switched by means of a switching circuit 46 between fields 51a without title and fields 51b with title. When the field outputted from a video signal reproducing circuit 32 is the field 51b with title, the information in a specific section 50 of field videos is stored in a memory circuit 43. When the field is the field 51a without title, the information of the section is synthesized with the information of the section 50 of one field before stored in the circuit 43 by means of an adder 45 and inputted to a switching circuit 46 on the reproducing side as the field 51b with title. Since titles can be erased from the screen by operating a switch, easy to see pictures can be obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applied to camera-integrated video tape recorders (hereinafter referred to as VTRs), etc., and is used to synthesize information signals such as characters with video signals to produce a recording medium. The present invention relates to a magnetic recording and reproducing device configured to record on and reproduce data on a magnetic recording medium.

[Prior Art] Fig. 9 shows a conventional device of this kind, for example, a camera integrated type V.
It is a block diagram showing the configuration of TR, and in the same figure, (
1) is a system control unit, (2) is an imaging device unit that images a subject, converts the captured image of the subject into an electrical signal and outputs it, and (3) is an image output from this imaging device unit (2). This is a rotary head type magnetic recording/reproducing unit (hereinafter referred to as a VTR unit) that records and reproduces signals on a magnetic tape (not shown).

The system control section (1) is a circuit block that controls the operation of the entire system, and obtains information from various sensors (11) and various operation switches (12) such as the start/stomps inch and playback keys to control various operations. A system control signal (14) sets the system to a predetermined operating state, and various display devices (13) display various operations.

The imaging device section (2) is composed of an imaging section (21), an electrical signal processing circuit (22), a synchronization signal generation circuit (23), a title creation circuit (24), and an addition circuit (25). , the title creation circuit (24) and the addition circuit (25) constitute a title insertion circuit (20).

When performing normal photography, the image capturing section (21) forms an image of the subject through a lens on a charge storage section (not shown) of an image capturing device such as a CCD. The object image formed on this charge storage section is scanned by a signal from a synchronization signal generation circuit (23) and read out in the form of a temporally continuous electrical signal. This read electrical signal is converted into a normal television signal by an electrical signal processing circuit (22), and this television signal is output from the imaging device section (2) via an adding circuit (25).

When you want to superimpose text or the like on a subject image, first image the text you want to superimpose through a lens, convert this image into an electrical signal, and then store it in the memory in the title creation circuit (20).Next, While photographing the subject you want to photograph, a synchronization signal generator (
23) reads information signals such as previously stored characters from the memory in the title creation circuit (20), and sends the read information signals to the electrical signal processing circuit (22) in the adder (25). The imaging device unit (2) outputs a signal on which information signals such as characters are superimposed.

On the other hand, the VTR section (3) includes a video signal recording circuit (31
), video signal reproduction circuit (32), drum control circuit (33)
) and a capstan control circuit (34), etc., and the television signal output from the imaging device section (2) is recorded as an FM signal in the video signal recording circuit (31).
The signal is converted into a modulated signal, inputted to a rotating magnetic head (3G) via a recording/reproducing switch (35) and a rotary transformer (not shown), and recorded on a magnetic tape by this head (36). The drum rotation control circuit (33) is
The drum motor (37) is driven to control the drum to rotate at a constant rate, and the capstan control circuit (34) drives the capstan motor (38) to control the magnetic tape speed to a predetermined speed. Control.

[Problems to be Solved by the Invention] Since the conventional magnetic recording and reproducing device is configured as described above, it is possible to easily synthesize a title such as a date when photographing a subject. However, the image of the subject obtained by the imaging section (21) and the title information obtained from the title creation circuit (24) are combined into one video signal in the video signal superimposed by the adder (25). Therefore, when performing a playback operation through the video signal playback circuit (32), even if you try to select between a video without a title such as the date and a video with a title superimposed, only the video with the title superimposed will always be viewed. There was the inconvenience of not being able to do so.

This invention was made to solve the above-mentioned problem, and even if a title such as the date is superimposed on the recorded video, the title will be superimposed on the video excluding the title such as the date during playback. An object of the present invention is to provide a magnetic recording/playback device that allows selective viewing of recorded videos.

[Means for Solving the Problems] A magnetic recording and reproducing apparatus according to the present invention records fields with a title and fields without a title in a mixed arrangement using a switching circuit on the recording side. The information of a specific area where is written is stored in a memory circuit, and a switching circuit on the playback side is used to switch between when only information with a title is input into the specific area and when only information without a title is input. Features.

Also, during recording, fields with titles are intermittently arranged between fields without titles, and during playback, information on a specific area where this title is written is stored in the memory circuit, and this information with titles is stored in the memory circuit. is combined with a field without a title by an adder, and either the video signal consisting of a field without a title and sent out from the magnetic head is directly reproduced, or the video signal consisting of a field with a title is output from the adder. Alternatively, the user may select whether or not to play back the video signal.

[Function] In the present invention, by manipulating the switching timing of the reproduction side switching circuit, a video composed only of fields with a title and a video composed only of fields without a title are selectively switched. Can be played.

In addition, even in cases where fields with titles recorded are intermittently placed in fields with no titles recorded, when the title is desired to be viewed, a video signal consisting of all fields with titles is played back through the adder mentioned above. Therefore, when viewing, it is possible to arbitrarily select between a screen with a title and a screen without a title.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing the configuration of an example in which a magnetic recording/reproducing device according to an embodiment of the present invention is applied to a camera-integrated VTR. , are given the same reference numerals, and their description will be omitted.

In FIG. 1, (40) is a recording-side switching circuit that switches between the video signal output from the electrical signal processing circuit (22) and the video signal obtained through the adder (25). 31), a field with a title and a field without a title to which no title is added are mixed and sent.

(43) is a video signal reproducing circuit (
32), which stores video information only for a specific area in which a title is inserted in the video signal. (45) is an adder connected to the output end of the video signal reproducing circuit (32) and the output end of the memory circuit (43), and is an adder connected to the output end of the video signal reproducing circuit (32) and the output end of the memory circuit (43). ) and a video signal (40) in which only information of a specific area is stored in a memory circuit (43) and output after being delayed by l fields.

(4B) is a switching circuit on the playback side, which is a video signal (41) directly output from the video signal playback circuit (32).
) and the video signal (
(47) is selectively switched and output. (48) is an output terminal for the finally obtained video signal.

Next, the operation of the above configuration will be explained.

[I] Regarding the operation during recording: The subject image formed on an image sensor such as a CCD in the photographing section (21) is scanned by a signal from the synchronization signal generation circuit (23), and is converted into a temporally continuous electric signal. It is read out in the form This read signal is sent to the electrical signal processing circuit (22)
is converted into a regular television signal.

On the other hand, for titles such as dates and characters, the title creation circuit (
24) and stored in the memory therein. This title is then superimposed on the television signal by an adder (25). Recording side switching circuit (4
In o), the video signal (40a) directly output from the electrical signal processing circuit (22) and the video signal (40b) on which the title is superimposed via the adder (25) are selectively switched and sent.

Figures 2 (A) and (B) respectively show images displayed on a television monitor, and Figure 2 (A) is an image from an untitled field directly output from the electrical signal processing circuit (22). Indicates a video signal (tOa) composed of
The second rgJ (B) shows a video signal (40b) consisting of a field with a title superimposed on it through an adder (25). In the video signal (40b) shown in FIG. 2(B), it is assumed that title information such as date is superimposed only in a specific area (50). The recording side switching circuit (40) outputs the video signal (aO
a) and the video signal (40b) are selectively switched and input to the video signal recording circuit (31) of the VTR section (3).
) switching operation will be explained.

The magnetic head (38) is mounted on a rotating drum (not shown).
A pair of magnetic heads (
36), it is assumed that when a 180° winding section is scanned, an image for one field is obtained. In such a configuration, each magnetic head (3
6), two types of field images can be obtained, and a head switching signal is used as a means for switching between these two images, and this signal is either high level (H level) or low level (L level).
level).

Now, the video when the H-7 switching signal is at H level is the video signal (40a) shown in FIG. 2 (A), and the video when it is at L level is the video signal (40a) shown in FIG. 2 (B). (40b), the video signal (aOa) in FIG. 2(A) and the video signal (40b) in FIG. 2(B) will alternate. It will be output to . In this way, the signal passed through the recording side switching circuit (40) is transferred to the video signal recording circuit (40).
31), and is recorded on the magnetic tape by a magnetic head (38).

[II] Regarding the operation during playback: During playback, the video signal playback circuit (3
The signal that has passed through 2) is divided into two video signals, namely the video signal (
41) and a video signal (42). Video signal (
41) is further branched into a video signal sent directly to the reproduction side switching circuit (4B) and a video signal sent to the adder (45). The video signal (42) is stored in a memory circuit (43) in which only the information of the specific area (50) shown in FIGS. (45).In other words, the specific area (50
) information is extracted and replaced by the memory circuit (
The information of the specific area (50) output from 43) is replaced.

To explain in more detail, in the case of a video signal consisting of a field without a title, as shown in FIG.
The signal in the specific area (50) of the video signal consisting of fields with titles as shown in B) will be replaced. The signal thus synthesized via the adder (45) is sent to the terminal (
48b).

On the other hand, the video signal (41) directly output from the video signal reproduction circuit (32) is input to the terminal (48a) of the reproduction side switching circuit (46). This switching operation of the playback side switching circuit (46) allows selection between obtaining a screen with titles in all fields and obtaining a screen with no titles in all fields.This switching operation will be explained below. do.

Figures 3(A) and 3(B) show the playback side switching circuit (46
) shows the switching operation.

First, as shown in FIG. 3(A), a video signal reproducing circuit (
If the field output from 32) is a field with a title (51b), that is, the head switching signal is a low level (L level) field, the contact of the playing side feature circuit (46) is a contact. (4Ei
It is connected to side a), and this field video with title (51b) is directly output. Information on the specific area (50) of the field video output from the video signal reproduction circuit (32) at this time is stored in the memory circuit (43).

Furthermore, as shown in FIG. 3(B), a video signal reproducing circuit (
32) is a field without a title (51a), that is, a field in which the head switching signal is at a high level (H level), this field without a title (51a) is a field without a title (51a).
43) The specific area one field before (50
) information and is synthesized in the adder (45), and the playback side feed 2 is synthesized as a field video with title (51b).
The signal is input to the switching circuit (46). This playback fee 2
The contact of the switching circuit (46) is connected to the contact (46b) side when the head switching signal is at a high level (H level).
(51b) is output from the reproduction side switching circuit (46).

Figures 84 (A) and (B) respectively show the playback side switching circuit (4
6) shows the operation.

First, as shown in Figure 4 (^), the video signal reproducing circuit (
32) is a field without a title (51a), that is, a field where the head switching signal is high level (H level), the contact of the playback switching circuit (4B) is on the contact (46a) side. and its untitled field video (51
a) is output directly. Then, the information of the specific area (50) of the field information output from the video signal reproduction circuit (32) at this time, that is, the information without a title, is stored in the memory circuit (43).

Next, as shown in FIG. 4(B), the field output from the video signal reproducing circuit (32) becomes a field with a title (51b), that is, a field where the head switching signal is at a low level (L level). In case of switching, the specific area (50) of this titled signal is replaced in the adder (45) with the information of the untitled specific area (50) stored in the memory circuit (43) before the l field. It turns out. Therefore, the signal input to the contact (46b) of the reproduction side switching circuit (46) becomes the field video without title (51b). (L level), the contact (48
b) side, and this titleless field video (51b) is output from the reproduction side switching circuit (46).

The above operations are summarized in an easy-to-understand table as shown in Figure 5.
As can be seen from this table, by changing the switching direction according to the head switching signal, it is possible to switch between viewing images with titles in all fields and viewing images with no titles in all fields. can.

In the above embodiment, fields with a title and fields without a title are arranged alternately for each field. However, this arrangement does not necessarily have to be used. For example, after recording one screen of fields with a title, It is also possible to record fields without titles in succession for several screens, and then record fields with titles again for one screen.However, in this case, switching of the switching circuit (4B) on the playback side is done by switching the head. It cannot depend on the H/L level of the signal.

Therefore, an identification signal that can be detected during playback is recorded in the field in which a field with a title is recorded, and this signal causes the playback side switching circuit (
46).

FIG. 6 is a block diagram showing the configuration of another embodiment of the invention.

In the figure, (60) is a recording side switching circuit,
A video signal output from the electrical signal processing circuit (22);
This is to switch between the video signal obtained through the adder (25), and between fields without titles,
Fields with titles are arranged intermittently and sent to the lj&ki head (36) via the video signal recording circuit (31).

(61) is a title on/off switch connected to the output end of the video signal reproduction circuit (32), with a terminal (81a) connected when a title is not needed and a terminal (61b) connected when a title is needed. and has.

(B2) is a memory circuit into which the video signal branched and output from this terminal (Blb) is input, and this memory circuit (62) is limited to a specific area (50) where the title in the field is written. It is designed to memorize.

(63) is an adder that combines the output from the memory circuit (62) and the other output signal from the terminal (Blb). That is, the terminal (et) of the switch (61)
The information of the specific area (50) in the video signal output from b) will be replaced with what was stored several fields ago in the memory circuit (62).

(64) is the reproduction side switching circuit, and the terminal (64a)
.

(e4b), the terminal (84a) receives a signal from the terminal (81b) of the title presence/absence switch (61), and the terminal (84b) receives the signal from the adder (63).
A video signal synthesized at is input. (135) is an output terminal when not passing through the memory circuit (62), etc.
In other words, if a title is not required, the output terminal (6
6) is an output terminal when a title is required.

Since the other configurations are the same as those in FIG. 1, the same reference numerals are given to the corresponding parts and the explanation thereof will be omitted.

Next, the operation shown in FIG. 6 will be explained.

[I] Regarding the operation during recording: The subject image formed on an image sensor such as a CCD in the photographing section (21) is scanned by a signal from the synchronization signal generation circuit (23), and is converted into a temporally continuous electric signal. It is read out in the form This read signal is converted into a normal television signal in an electrical signal processing circuit (22).

On the other hand, for titles such as dates and characters, the title creation circuit (
24) and stored in the memory therein. This title is then superimposed on the television signal by an adder (25). Recording side switching circuit (6
0), the video signal directly output from the electrical signal processing circuit (22) and the video signal on which the title has been superimposed via the adder (25) are switched and sent out.

7(A) and 7(B) respectively show images displayed on a television monitor, and FIG. 7(A) shows an untitled field directly output from the electrical signal processing circuit (22). 51), FIG. 7(B) shows a field with title (52) on which the title is superimposed through the adder (25).

Field without title (51) and field with title (52) in recording side switching circuit (8o)
are selectively switched and input to the video signal recording circuit (31) of the VTR section (3).

The operation of this recording side sweeping circuit (6o) will be explained.

Currently, title information is assumed to include date, time, etc., and the content of the information can only change at extremely limited times. For example, with regard to date information, it is almost impossible for the date information at the start of recording to change within the shooting period.

Furthermore, if the time information is displayed in hours and minutes, it will only be replaced with new information once per minute. Therefore, the recording side switching circuit (60) is connected to the terminal (EIOb) on the side of the field (52) with a title only at the timing when new title information is entered, and at other times, the field (51) with no title is connected to the terminal (EIOb) on the side of the field (52) with a title. It is assumed that the terminal (eoa) is connected to the side terminal (eoa).

For example, when displaying the date and time (hours and minutes) as title information, first, only one field information amount is connected to the terminal (8Qb) at the timing of starting shooting.
The subsequent fields are connected to the terminal (60a) side. If the minute information changes within one minute from the start of shooting, the recording side switching circuit (60) switches the terminal (
Only one field information amount is connected to the terminal (SOa) side, and subsequent fields are connected to the terminal (SOa) side.

When connected to this terminal (80b) side, it is necessary to record a switching signal on the magnetic tape. There are various ways to do this, including a geared stan motor (not shown).
There is a method of recording a signal that can detect the switching timing of the recording side switching circuit (60) in the CTL signal part that controls the running of the magnetic tape.

In this way, a video signal is sent out in an arrangement in which fields (52) with titles are interposed intermittently in fields (51) without titles, and the magnetic head (36)
) will be recorded on the recording tape. Note that, as a matter of course, the recording/reproducing switch (35) is connected to the terminal (35a) side.

[11] Regarding the operation during playback: During playback, the recording/playback switch (35) is connected to the terminal (35b) side, and the signal that has passed through the video signal playback circuit (32) is sent to the title presence/absence switch (61). is input.

When this switch (61) is connected to the terminal (eta) side, the output terminal (61) is connected without performing the video processing described below.
5) Sent to the side. The recorded video signal has a field (52) with a title intermittently interposed in a field (51) without a title, but even when the title is displayed in minutes, the rate is 6° field/second × 60 seconds = Out of 3800 fields, only one field has a title (52), and all others have no titles (51), so visually only a screen with no title displayed is visible. That is, the terminal (81a) side of the title presence/absence switch (61) is a terminal to be connected when a title is not required.

Next, when it is desired to display and reproduce the title, connect the title presence/absence changeover switch (61) to the terminal (Blb) side. The operation when a field with a title (52) comes is shown in FIG.
information is stored in the memory circuit (62). At this time, the reproduction side switching circuit (64) is connected to the terminal (84a) side, and the output terminal (66) is connected to the adder (43).
From the next field, a field with a title (51) is sent for one page, and a field without a title (52) is sequentially transferred to the title/non-title switch (61).
), the operation at this time is shown in Figure 8 (B).
The video signal output from the terminal (Blb) shown in is a field (51) without a title, but information on a specific area (50) containing the title stored in the memory circuit (42) at the time of the previous field. and is combined by an adder (43). Playback side switching circuit (60 is the terminal (84a)
A field (52) with a title is output from the output terminal (66).

Until the next switching timing signal is obtained from the CTL signal, the information stored in the memory circuit (62) is inserted, as shown in FIG. 8(B). The part other than the title of the specific area (5o) is the previous video part, so it does not match with the video of other ranges.
However, when displaying date or time, the range of the specific area (50) does not need to be large and does not become unsightly.

Next, when the field with title (52) is output from the title/presence changeover switch (61), the memory circuit (62) responds to the switching timing from the CTL signal.
) storage information is new in the specific area (52) of the field (52).
50) information. Then, the reproducing side switching circuit (64) is connected to the terminal (84a) only for that one field, and is connected to the original terminal (84b) again in the subsequent fields.

In this way, the memory circuit (62) and the reproduction side switching circuit (
60 operates, and only the field (52) with title is output from the output terminal (6B).

[Effect of the invention] As described above, according to the invention of claim 1, even if a title is superimposed and recorded at the time of recording, fields in which a title is recorded and fields in which a title is not recorded coexist. During playback, you can selectively switch between a video consisting of only fields with a title and a video consisting only of fields without a title, so if you think the title is bothersome. , it is possible to erase this title from the screen by operating a switch, making it possible to obtain an easier-to-read screen.

Also, in the invention of claim 2, fields in which titles are recorded are intermittently arranged between fields in which no titles are recorded, and when played back, the video is almost entirely composed of fields with titles. is made up of fields without titles, and can be selectively switched between what is considered to be virtually titleless video, so only when you want to see the title.
It is possible to display the title on the screen by operating a switch, and to erase the title from the screen when it is not needed.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of an example in which the magnetic recording and reproducing device according to the present invention is applied to a camera-integrated VTR, and Figs. 2 (A) and (B) show images without a title and images with a title in the same VTR, respectively. Figure 3 showing images of
Figures (A) and (B) are explanatory diagrams of the main parts when obtaining an image with a title in the same VTR, respectively, and Figure 4 (A),
CB) is an explanatory diagram of the main part when obtaining an image without a title in the same VTR, and Figure 5 is an explanatory diagram of the main part when obtaining an image without a title, and Figure 5 is an illustration of Figure 3 (A) and (
FIG. 6 is a block diagram showing the configuration of a magnetic recording and reproducing apparatus according to another embodiment of the present invention. Figures 7 (A) and CB) are diagrams showing an image without a title and an image with a title in Figure 6, respectively, and Figures 8 (A) and (B) are images in Figure 6, respectively.
FIG. 9 is a block diagram showing the configuration of a conventional magnetic recording and reproducing apparatus. (20...Title creation circuit, (36)...Magnetic head, (40), (80)...Recording side switching circuit, (40a). (51), No title L for (51a) (7 ) 74-root, (40b). (51b), (52)...Field with title, (43). (62)...Memory circuit, (45), (83)...
- Adder, (4B). (64)...Reproduction side switching circuit, (5o)...
・Specific area, (61)...Title presence/absence switch. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In a magnetic recording/playback device configured to combine a title information signal obtained by a title creation circuit with a video signal, record it on a magnetic recording medium using a magnetic head, and play it back, a title is added at the time of recording. a recording-side switching circuit that sends a video signal to the magnetic head by mixing a field with a title and a field without a title to which the title is added; and a video signal obtained from the magnetic head during playback. a memory circuit for identifying a field with a title from a field without a title and storing information of a specific area in which the title is written; and an adder for combining the information stored in the memory circuit with the original field; 1. A magnetic recording and reproducing apparatus comprising a reproduction side switching circuit that selectively extracts a video composed of only fields with a title and a video composed only of fields without a title. (2) Instead of the recording side switching circuit, the field with a title is intermittently arranged between fields without a title to which no title is added during recording, and a video signal is sent to the magnetic head side. A switching circuit on the recording side, in place of the memory circuit, identifies a field without a title and a field with a title from the video signal obtained from the magnetic head through the title/presence changeover switch during playback, and selects a field in the field with a title. a memory circuit for recording information of a specific area in which a title is written, and an adder for combining information with a title stored in the memory circuit with a field without a title in place of the adder, When you want to see a title, the video signal consisting of all fields with titles is played back through the above adder through the playback switching circuit, and when you do not want to see a title, the video signal is played back through the above adder and the video signal is played back through the playback switching circuit. 2. The magnetic recording and reproducing apparatus according to claim 1, wherein the video signal obtained from said magnetic head is directly reproduced by switching.